Insect Alert For

Corn Earworm

Risk Level:
Moderate Risk Level
Affected Area:
Full page
Alert Details

Corn earworm migration risks increase especially across the northern corn-growing region throughout the next five days. High pressure currently parked over the heart of the corn-growing region will eventually slide off to the east and should reach the eastern United States by Wednesday or Thursday. Meanwhile, a cold front pushing into the Plains and upper Midwest will result in scattered areas of rainfall. South to southwest winds will be a persistent feature to the east of the cold front for several days. While crops across the central and southern corn-growing region are already past critical insect damage growth stages, there are still several areas across the upper Midwest and Great Lakes region where some field crops but especially fresh market and processor crops are at vulnerable stages to damage from new flights. For this reason, increased corn earworm risks are predicted mainly north of US 20 and initially in the Dakotas and Minnesota on Tuesday and Wednesday nights. The risk area expands east into the Great Lakes region thereafter as a cold front pushes east into the upper Midwest and Plains by the end of the week and into the early portion of the upcoming holiday weekend.